If you have been getting around 40-day cycles recently, and if you are not on any contraception
and planning to conceive, you may go for a trans-vaginal sonogram and a serum beta-hCG
assay to confirm/exclude pregnancy
. Also, I would suggest a complete evaluation by a specialist for future treatment if pregnancy is excluded. Also, please try to maintain a healthy weight, do some regular exercise and eat healthy. Hope this information is useful. Good luck.